Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] Do not attempt to close invalidated file handles
  [CIFS] fix check for dead tcon in smb_init

diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 8855331..e078b7a 100644 (file)
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -8,7 +8,11 @@ handling fcntl(F_SETLEASE).  Convert cifs to using blocking tcp
 sends, and also let tcp autotune the socket send and receive buffers.
 This reduces the number of EAGAIN errors returned by TCP/IP in
 high stress workloads (and the number of retries on socket writes
-when sending large SMBWriteX requests).
+when sending large SMBWriteX requests).  Fix case in which a portion of
+data can in some cases not get written to the file on the server before the
+file is closed.  Fix DFS parsing to properly handle path consumed field,
+and to handle certain codepage conversions better.  Fix mount and
+umount race that can cause oops in mount or umount or reconnect.
 
 Version 1.54
 ------------

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index f1ae1f5..c57c056 100644 (file)
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -606,7 +606,15 @@ GLOBAL_EXTERN struct list_head             cifs_tcp_ses_list;
  * changes to the tcon->tidStatus should be done while holding this lock.
  */
 GLOBAL_EXTERN rwlock_t         cifs_tcp_ses_lock;
-GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;  /* protects list inserts on 3 above */
+
+/*
+ * This lock protects the cifs_file->llist and cifs_file->flist
+ * list operations, and updates to some flags (cifs_file->invalidHandle)
+ * It will be moved to either use the tcon->stat_lock or equivalent later.
+ * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
+ * the cifs_tcp_ses_lock must be grabbed first and released last.
+ */
+GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
 
 GLOBAL_EXTERN struct list_head GlobalOplock_Q;
 

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index bdda46d..2af8626 100644 (file)
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -295,7 +295,7 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
           check for tcp and smb session status done differently
           for those three - in the calling routine */
        if (tcon) {
-               if (tcon->need_reconnect) {
+               if (tcon->tidStatus == CifsExiting) {
                        /* only tree disconnect, open, and write,
                          (and ulogoff which does not have tcon)
                          are allowed as we start force umount */

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 6449e1a..b691b89 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -488,12 +488,13 @@ int cifs_close(struct inode *inode, struct file *file)
        pTcon = cifs_sb->tcon;
        if (pSMBFile) {
                struct cifsLockInfo *li, *tmp;
-
+               write_lock(&GlobalSMBSeslock);
                pSMBFile->closePend = true;
                if (pTcon) {
                        /* no sense reconnecting to close a file that is
                           already closed */
                        if (!pTcon->need_reconnect) {
+                               write_unlock(&GlobalSMBSeslock);
                                timeout = 2;
                                while ((atomic_read(&pSMBFile->wrtPending) != 0)
                                        && (timeout <= 2048)) {
@@ -510,12 +511,15 @@ int cifs_close(struct inode *inode, struct file *file)
                                        timeout *= 4;
                                }
                                if (atomic_read(&pSMBFile->wrtPending))
-                                       cERROR(1,
-                                               ("close with pending writes"));
-                               rc = CIFSSMBClose(xid, pTcon,
+                                       cERROR(1, ("close with pending write"));
+                               if (!pTcon->need_reconnect &&
+                                   !pSMBFile->invalidHandle)
+                                       rc = CIFSSMBClose(xid, pTcon,
                                                  pSMBFile->netfid);
-                       }
-               }
+                       } else
+                               write_unlock(&GlobalSMBSeslock);
+               } else
+                       write_unlock(&GlobalSMBSeslock);
 
                /* Delete any outstanding lock records.
                   We'll lose them when the file is closed anyway. */
@@ -587,15 +591,18 @@ int cifs_closedir(struct inode *inode, struct file *file)
                pTcon = cifs_sb->tcon;
 
                cFYI(1, ("Freeing private data in close dir"));
+               write_lock(&GlobalSMBSeslock);
                if (!pCFileStruct->srch_inf.endOfSearch &&
                    !pCFileStruct->invalidHandle) {
                        pCFileStruct->invalidHandle = true;
+                       write_unlock(&GlobalSMBSeslock);
                        rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid);
                        cFYI(1, ("Closing uncompleted readdir with rc %d",
                                 rc));
                        /* not much we can do if it fails anyway, ignore rc */
                        rc = 0;
-               }
+               } else
+                       write_unlock(&GlobalSMBSeslock);
                ptmp = pCFileStruct->srch_inf.ntwrk_buf_start;
                if (ptmp) {
                        cFYI(1, ("closedir free smb buf in srch struct"));

diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index addd1dc..9ee3f68 100644 (file)
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -555,12 +555,14 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
                                continue;
 
                        cifs_stats_inc(&tcon->num_oplock_brks);
+                       write_lock(&GlobalSMBSeslock);
                        list_for_each(tmp2, &tcon->openFileList) {
                                netfile = list_entry(tmp2, struct cifsFileInfo,
                                                     tlist);
                                if (pSMB->Fid != netfile->netfid)
                                        continue;
 
+                               write_unlock(&GlobalSMBSeslock);
                                read_unlock(&cifs_tcp_ses_lock);
                                cFYI(1, ("file id match, oplock break"));
                                pCifsInode = CIFS_I(netfile->pInode);
@@ -576,6 +578,7 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
 
                                return true;
                        }
+                       write_unlock(&GlobalSMBSeslock);
                        read_unlock(&cifs_tcp_ses_lock);
                        cFYI(1, ("No matching file for oplock break"));
                        return true;

diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 58d5729..9f51f9b 100644 (file)
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -741,11 +741,14 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
           (index_to_find < first_entry_in_buffer)) {
                /* close and restart search */
                cFYI(1, ("search backing up - close and restart search"));
+               write_lock(&GlobalSMBSeslock);
                if (!cifsFile->srch_inf.endOfSearch &&
                    !cifsFile->invalidHandle) {
                        cifsFile->invalidHandle = true;
+                       write_unlock(&GlobalSMBSeslock);
                        CIFSFindClose(xid, pTcon, cifsFile->netfid);
-               }
+               } else
+                       write_unlock(&GlobalSMBSeslock);
                if (cifsFile->srch_inf.ntwrk_buf_start) {
                        cFYI(1, ("freeing SMB ff cache buf on search rewind"));
                        if (cifsFile->srch_inf.smallBuf)